Experiment 2: Laboratory Techniques and Measurements Essay

1705 WordsSep 28th, 20127 Pages

Experiment 2: Laboratory Techniques and Measurements

Course Number: CHE 111

Abstract: This experiment introduced the student to lab techniques and measurements. It started with measuring length. An example of this would be the length of a nickel, which is 2cm. The next part of the experiment was measuring temperature. I found that water boils around 95ºC at 6600ft. Ice also has a significant effect on the temperature of water from the tap. Ice dropped the temperature about 15ºC. Volumetric measurements were the basis of the 3rd part of the experiment. It was displayed during this experiment that a pipet holds about 4mL and that there are approximately 27 drops/mL from a short stem pipet. Part 4 introduced the student to measuring…show more content…

It used mass, temperature, length, volume, density, and making a dilute solution. I learned the importance as well as the difficulty of making proper measurements in a lab setting. If one measurement is off, it will throw the entire equation off. This will give either incorrect or inaccurate results.

Questions:
A. Water boils at 100°C at sea level. If the water in this experiment did not boil at 100°C, what could be the reason? The experiment was conducted at 6600ft. Water tends to boil at a lower temperature at higher altitudes.

B. While heating two different samples of water at sea level, one boils at 102°C and one boils at
99.2°C. Calculate the percent error for each sample from the theoretical 100.0°C.
102°C-100°C/100°C*100%=0.02% 99.2°C -100°C /100°C *100%= -0.01%
Percent error = 0.02% and -0.01%

D. A sample of gold (Au) has a mass of 26.15 g. Given that the theoretical density is 19.30 g/mL, what is the volume of the gold sample? 26.15g/19.30g/mL=1.35mL

E. Which method for determining density is more accurate, the water displacement method or the Archimedes’ principle method? Why? The water displacement method is more accurate. The string used to suspend the object in the Archimedes’ Method could

Lab One: Laboratory Techniques and Measurements
Abstract
The Lab One was done on Laboratory Techniques and Measurements. The first experiment with my Lab partner; we got opportunity to experiment how to conduct measurements in length by using metric conversion. We started in cm units and changed into mm by x10, and moving decimal point x1 to right. To find in meter we moved from cm to meter two decimal points to the left or double check our self divided by 100 and all records in data…

General Chemistry 1
Lab 1: Laboratory Techniques and Measurements
Purpose: The purpose of this lab is to ensure that students are able to understand how to conduct measurements of length, mass, temperature, density and volume using different measuring devices. Students will also learn how to dilute substances by using simple algebra.
Procedure:
1. Prepare a data table similar to Data Table 1 shown below.
2. Choose any three objects that are shorter than the metric ruler to measure…

Title
Laboratory Techniques and Measurements
Purpose
The purpose of this experiment is to determine mass, length, temperature, volume, and density of objects and liquids using common measuring devices and algebraic formulas. The metric system, the most common set of measurements used in science, which includes meters, liters, Celsius, and grams will be used.
Procedure
The following items were used within the experiment:
(1) Metric ruler with centimeter (cm) and millimeter (mm), (1)…

Laboratory Techniques and Measurements
Peter Jeschofnig, Ph.D. Version 42-0165-00-01
Lab RepoRt assistant
This document is not meant to be a substitute for a formal laboratory report. The Lab Report Assistant is simply a summary of the experiment’s questions, diagrams if needed, and data tables that should be addressed in a formal lab report. The intent is to facilitate students’ writing of lab reports by providing…

Title: Laboratory Techniques & Measurements
Purpose: To become familiar with the International System of Units and common laboratory equipment and techniques. To learn how to determine volume, mass, length, and temperature of a wide variety of items. To learn how to calculate density and concentration of dilutions.
Procedure: I used a ruler, thermometer, and scale to take measurements. I used a graduated cylinder, short step pipet, scale, and ruler to determine volume and density. I used a…

Lab #3
January 30, 2012
1. Title: Laboratory Techniques and Measurements
2. Purpose: The purpose of this lab is to learn laboratory techniques and to how to measure precisely. During this lab I will learn how to measure length, temperatures, volume, density, and mass using laboratory equipment. I will be using laboratory equipment to prepare dilutions and calculate them while using an algebraic formula.
3. Procedure: In order to perform this lab I needed the following materials:…